-- @testpoint: opengauss关键字Interval(非保留)，作为函数名 合理报错

--关键字不带引号-合理报错
drop function if exists Interval(i integer);
create function Interval(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
--关键字带双引号-成功
drop function if exists "Interval"(i integer);
create function "Interval"(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
--关键字带单引号-合理报错
drop function if exists 'Interval'(i integer);
create function 'Interval'(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
--关键字带反引号-合理报错
drop function if exists `Interval`(i integer);
create function `Interval`(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
--清理环境
drop function if exists "Interval"(integer);
